Home / Chemicals / Pool / Water Balancers / 4# pH Increaser “5lb Rapid Shock” has been added to your cart. View cart $11.99 4# pH Increaser quantity Add to cart SKU: 84455 Categories: Chemicals, Pool, Water Balancers Product ID: 4370 Description Description Raises pH in pool water. Related products Sale! 50lb 3″ Chlorine Tablets $299.99 Original price was: $299.99.$249.99Current price is: $249.99. Add to cart Sale! 5lb 1″ Chlorine Tablets $57.99 Original price was: $57.99.$54.99Current price is: $54.99. Add to cart Sale! Box of 12- 1 lb Bags of Rapid Shock – $89.99 Original price was: $89.99.$62.99Current price is: $62.99. Add to cart Sale! 65 lb Turbo Shock $487.99 Original price was: $487.99.$405.99Current price is: $405.99. Add to cart